Zachary Callahan, M.D.
Surgery Physician · Nashville, TN
Zachary Callahan, M.D. is a surgery physician with a practice address in Nashville, Tennessee, and NPI 1679969067, issued on Apr 13, 2015. Check the license (Tennessee 66510, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Zachary Callahan
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 66510 TN
Self-reported in NPPES; status is on the state search - Practice location
- 410 42ND Ave N Ste 400, Nashville, TN 37209
- Phone
- (615) 329-7887
- Enumerated
- Apr 13, 2015
- Record last updated
- Jan 5, 2026
- Fax
- (615) 340-4537
- Medicare enrollment
- Enrolled (PECOS I20221101001023); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 631 in Tennessee → Look up another NPI →
Also registered at 410 42ND Ave N Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mariana Chavez, M.D.Surgical Oncology Physician1265787550
- Mark Cooper, M.D.Surgery Physician1497752489
- Gretchen Edwards, M.D.Surgery Physician1043607815
- Trudie Goers, M.D.Surgery Physician1073775706
- James Griscom, MDSurgery Physician1760989131
- Bassam Helou, M.D.Surgery Physician1407864069
Verify Zachary Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 66510Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average surgery physician in 2024
82 Medicare Part D claims for 28 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Omeprazole30 claims
- Oxycodone Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $7,348.71
29 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Advanced Diagnostic Imaging PCGoodlettsville, TN
- Tennessee Oncology PLLCTullahoma, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Callahan among 631 surgery physician records in Tennessee
Zachary Callahan, M.D. is one of 631 surgery physician records with a practice address in Tennessee. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 85% of them.
- NPI issued2015 · 85% of these records are older, 13% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2015 · median 2003 among the 404 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Tennessee
There are 631 surgery physician records in Tennessee.
All 631 in Tennessee → Every provider in Nashville → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Mark Cooper, M.D.Nashville, TN 372091497752489
- Gretchen Edwards, M.D.Nashville, TN 372091043607815
- Trudie Goers, M.D.Nashville, TN 372091073775706
- James Griscom, MDNashville, TN 372091760989131
- Bassam Helou, M.D.Nashville, TN 372091407864069
- George Lynch, M.D.Nashville, TN 372091447257274
- William Polk, M.D.Nashville, TN 372091356349963
- Marc Rosen, D.O.Nashville, TN 372091174593271
Common questions
What is Zachary Callahan, M.D.'s NPI number?
Zachary Callahan, M.D.'s National Provider Identifier (NPI) is 1679969067, issued on Apr 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Callahan, M.D. located?
The NPPES record lists a practice address at 410 42ND Ave N Ste 400, Nashville, TN, 37209. Phone: (615) 329-7887. Providers update this record themselves, so call before visiting.
How can I verify Zachary Callahan, M.D.'s license?
NPPES lists Tennessee license number 66510, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Callahan, M.D. prescribe under Medicare Part D?
In 2024, Zachary Callahan, M.D. had 82 Medicare Part D claims for 28 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.